Sofa



FIG. 1 is a top front perspective view of a sofa showing my new design;

FIG. 2 is a bottom rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a left elevational view thereof; and,

FIG. 8 is a right elevational view thereof. 

CLAIM The ornamental design for a sofa, as shown and described. 